JP3707595B2 - Battery connection plate - Google Patents

Battery connection plate Download PDF

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Publication number
JP3707595B2
JP3707595B2 JP24839899A JP24839899A JP3707595B2 JP 3707595 B2 JP3707595 B2 JP 3707595B2 JP 24839899 A JP24839899 A JP 24839899A JP 24839899 A JP24839899 A JP 24839899A JP 3707595 B2 JP3707595 B2 JP 3707595B2
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Prior art keywords
battery
bus bar
connection plate
flexible
battery connection
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JP24839899A
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JP2000149909A (en
Inventor
智洋 池田
敏 斉藤
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Toyota Motor Corp
Yazaki Corp
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Toyota Motor Corp
Yazaki Corp
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Priority to JP24839899A priority Critical patent/JP3707595B2/en
Priority to US09/391,355 priority patent/US6261719B1/en
Priority to EP99117819A priority patent/EP0986114B1/en
Priority to DE69917850T priority patent/DE69917850T2/en
Publication of JP2000149909A publication Critical patent/JP2000149909A/en
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Publication of JP3707595B2 publication Critical patent/JP3707595B2/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/28—End pieces consisting of a ferrule or sleeve
    • H01R11/281—End pieces consisting of a ferrule or sleeve for connections to batteries
    • H01R11/288—Interconnections between batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H01M50/51—Connection only in series
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/517—Methods for interconnecting adjacent batteries or cells by fixing means, e.g. screws, rivets or bolts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明はバッテリ接続プレートに関し、詳しくは正負の電極をそれぞれ反対側の端面に設けたいわゆる角型バッテリを互いに逆向きに重ね合わせたバッテリ重合体につき、バッテリを直列に接続する際に、電極間のピッチに僅かな違いがあっても、これを吸収して組付および製作を容易にできるようにしたものである。
【０００２】
【従来の技術】
近年、環境にやさしい自動車として、高電圧、高出力電源を必要とする電気自動車やハイブリッドカーが増加している。その中で、バッテリ（電槽）の小型化を図るため、多くの小型バッテリの集合化技術が重要となってきた。
【０００３】
図２０は従来のバッテリ集合体５０と小型の角型バッテリ５１の正負の電極５２，５３を直列に接続する前後一対のバッテリ接続プレート５４，５５を示す。
角型バッテリ５１の前後の端面には正極５２，負極５３としてのボルト（またはナット）が突出して設けられている。複数の角型バッテリ５１は正負の電極５２，５３を交互に逆向きにして重ね合わされ、ベルト５６を回して締付け、固定されている。
【０００４】
前部のバッテリ接続プレート５４は、図２１に示すように、合成樹脂製の基板部５７に対して左右両端側に一つ孔付きのバスバー５８、中間に複数の二つ孔付きのバスバー５９を横一列にインサート成形により組み込んで構成されている。ここで、一つ孔付きのバスバー５８とは、図２８（Ａ），（Ｂ）に示すように、上記の電極５２または５３を通すための電極接続用の孔６０を一個設けたバスバーをさし、二つ孔付きのバスバー５９とは二個の孔６０を設けたバスバーをさす。また、基板部５７の上側縁には複数のヒンジ６１によりカバー６２が開閉自在に取付けられ、ナット６３によりバッテリ接続プレート５４をバッテリ重合体５０に締付け固定した後に、ショートなどを防止するようになっている。６４はロック用の孔６４ａをあけた可撓係止片、６５は係止突起である。
【０００５】
後部のバッテリ接続プレート５５は、図２２に示すように、上記一つ孔付きのバスバー５８を有しない他はバッテリ接続プレート５４と同じであり、合成樹脂製の基板部５７′に対して二つ孔付きのバスバー５９を横一列にインサート成形により組み込んで構成され、その上側縁に複数のヒンジ６１により開閉自在のカバー６２′が設けられている。
【０００６】
従来のバッテリ集合体５０において、隣接する電極間のピッチＡ′は、角型バッテリ５１自体の巾Ａと、当該バッテリの正負の電極５２，５３間の芯ずれとが重なるから、バッテリ集合体５０の左右両端側に近づく程大きな公差をもつ。従って、一枚構造のバッテリ接続プレート５４，５５ではバスバー５８，５９の複数の孔６０と対応する電極５２，５３とに位置ずれが生じやすく、円滑な取付け作業が阻害されるおそれがあった。
【０００７】
このような事態に対処する手段として、図２１に示すように、例えば前部のバッテリ接続プレート５４の一端の孔６０を基準孔として、これから各電極５３，５２，５３…への孔６０までの寸法Ａ′，２Ａ′，３Ａ′…ｎＡ′（図示の例ではｎ＝１３）の公差をできるだけ小さくして製造時の寸法精度を上げる方法がある。しかし、これはコストアップを招くことになる。
【０００８】
第２の手段として、図２３（Ａ），（Ｂ）に示すように、二つ孔付きのバスバー５９と一つ孔付きのバスバー５８の孔６０の孔径をそれぞれ電極５２，５３よりも十分大きくする方法がある。しかし、これは電極５２，５３との接触面積が小さくなるから、抵抗増加による発熱のおそれがあり、電気的接続が不安定になる。
【０００９】
第３の手段として、角型バッテリ５１自体の巾寸法Ａとその電極５２，５３の位置だしの精度を上げ、それぞれの公差を小さくすることであるが、これもコストアップを招く。
【００１０】
【発明が解決しようとする課題】
本発明は上記従来技術の抱える問題点に着目してなされたものであり、角型バッテリ自体の巾寸法や正負電極の芯ずれの精度アップとは別に、バッテリ接続プレート自体の構造に創意を施して、バッテリ集合体の電極間のピッチに僅かな違いがあっても、これを吸収して組付および製作を容易にできる構造のバッテリ接続プレートを提供することを課題とする。
【００１１】
【課題を解決するための手段】
前述の課題を解決するために、請求項１記載の発明は、一端に正の電極、他端に負の電極を設けたバッテリを交互に逆向きに重ね合わせてなるバッテリ集合体を直列に接続するために、合成樹脂製の基板部にバスバー収容部が複数並列に設けられ、隣接するバッテリの電極を挿通する二つの孔を有するバスバーが各バスバー収容部内に設けられ、該バスバーと該バスバー収容部とでバッテリに対する接続部が構成されたバッテリ接続プレートにおいて、所定の数の前記接続部毎に、前記電極と前記バスバーの孔との位置ずれを調整するためのピッチ調整手段が前記基板部に設けられたことを特徴としている。
【００１２】
請求項１記載の発明によれば、例えばピッチ調整手段を設けるべき接続部の所定の数を二とすると、電極接続用の二つ孔付きのバスバーは二枚、孔は四つで四個の角型バッテリを接続することができる。そこで、バッテリ集合体５０が図２０のように１４個の角型バッテリ５１からなる場合には、当該１４個の電極が上記ピッチ調整手段により４極ずつに分けて接続されることになる。
したがって、バッテリ集合体の電極間のピッチの僅かな違いは、バッテリ接続プレートの基板部に設けたピッチ調整手段により吸収され、組み付けが容易になる。これにより、バッテリ集合体の両側ほど電極間のピッチの公差が大になるという問題は簡単に解消する。
また、上記ピッチ調整手段により分画された基板部の各部分は、例えば二枚の二つ孔付きのバスバーの四個の孔のピッチの精度のみを上げればよく、バッテリ接続プレート全体の精度はかなり緩やかになるから、コストアップが抑えられる。
【００１３】
請求項２記載の発明は、前記基板部にスリットが設けられ、該スリットの一方が開放され、該スリットの他方に逃がし孔を介して可撓部が形成されて、前記ピッチ調整手段が構成されたことを特徴としている。
請求項２記載の発明によれば、逃がし孔を中心としてスリットの両側で基板部が回動方向に変位して、バッテリの電極とバスバーの孔との位置ずれが吸収される。可撓部が薄肉である場合には、可撓部が基板部長手方向に伸縮して、スリットの両側で基板部が回動せずに長手方向に接離して、上記位置ずれが吸収される。可撓部はスリットと逃がし孔とにより容易に且つ低コストで樹脂成形される。
【００１４】
請求項３記載の発明は、前記基板部がスリットで分割され、各基板部の両側が一対のヒンジ状の可撓部で連結されて、前記ピッチ調整手段が構成されたことをを特徴としている。
請求項３記載の発明によれば、基板部の両側に可撓部があるから、何れの可撓部を支点としても基板部を回動することができ、回動方向が限定されないから、基板部長手方向のみならず、長手直交方向の位置ずれも吸収可能となり、位置ずれ吸収性が高まる。また、両側の可撓部が同時に基板部長手方向に伸縮して、スリットの両側で基板部が回動せずに長手方向に接離して位置ずれを吸収することも可能である。スリットと可撓部とは既存の樹脂成形技術により容易に且つ低コストで形成される。
【００１５】
請求項４記載の発明は、一端に正の電極、他端に負の電極を設けたバッテリを交互に逆向きに重ね合わせてなるバッテリ集合体を直列に接続するために、合成樹脂製の基板部にバスバー収容部が複数並列に設けられ、隣接するバッテリの電極を挿通する二つの孔を有するバスバーが各バスバー収容部内に設けられ、該バスバーと該バスバー収容部とでバッテリに対する接続部が構成されたバッテリ接続プレートにおいて、前記基板部が前記接続部毎に分割され、各接続部がヒンジ状の可撓部で相互に連結されて、前記電極と前記バスバーの孔との位置ずれを調整するためのピッチ調整手段が構成されたことを特徴としている。
請求項４記載の発明によれば、バッテリの電極とバスバーの孔との位置ずれが各接続部毎に吸収されて、位置ずれ吸収精度が高まる。また、ヒンジ状の可撓部によって前後左右上下の各方向に位置ずれが吸収され、これによっても位置ずれ吸収精度が高まる。それと同時にバッテリの電極に対する組付時及び組付後の応力が緩和され、バッテリの傷みが防止される。
【００１６】
また、請求項５記載の発明は、前記可撓部が前記基板部よりも前記バッテリ集合体の取付反対側に離間して設けられたことを特徴としている。
請求項５記載の発明によれば、バッテリから可撓部までのスパン（距離）が増し、てこの作用で可撓部の撓み動作がスムーズ且つ確実に行われると共に、大きく撓み可能となり、位置ずれ吸収効率が一層高まる。
【００２３】
【発明の実施の形態】
以下、本発明の実施の形態を図面を参照しながら説明する。なお、バッテリ集合体と小型の角型バッテリ等については説明の重複を避けるため従来例を示す図２０の記載を転用する。
図１は、本発明に係るバッテリ接続プレートの第一の実施形態を示すものである。
【００２４】
図１において、１は前記バッテリ集合体５０に対応する前部のバッテリ接続プレートを示し、該プレート１は合成樹脂製の基板部２に複数の長窓（バスバー収容部）４を横一列に設けると共に、各長窓４に二つ孔付きのバスバー５を埋設してバッテリに対するねじ締め固定用の接続部３を形成し、バッテリ集合体５０の隣接する角型バッテリ５１，５１間の正負の電極５２，５３を接続できるようにしてある。また、一群の接続部３の左右両端側には短窓４′と一つ孔付きのバスバー５′とからなる接続部３′が形成され、角型バッテリ５１の電極５２または５３に対して外部へのパワー線などが接続できるようになっている。
【００２５】
ここで、二つ孔付きのバスバー５とは前記の電極５２または５３を通すための電極接続用の孔６を二個設けた長いバスバーをさし、また、一つ孔付きのバスバー５′とは一個の孔６を設けた短いバスバーをさす。これらのバスバー５，５′は基板部２にインサート成形により一体に固定されている。なお、接続部３の長窓４は２個の短窓４′に分離して設けてもよく、要はバスバー５，５′の電極接続用の孔６の部分が外部に露出してボルト−ナットの締付けのできるスペースが確保されていればよい。
【００２６】
以上は図２０に示す従来のバッテリ接続プレート５４と同様の構成であるが、本発明では、所定の数の接続部３（または長窓４）毎にピッチ調整手段７を設けてある点が異なる。
【００２７】
ピッチ調整手段７は、前記バスバー５の孔６のピッチのずれを調整するためのものであり、基板部２の長手方向と直交する複数のスリット８を有し、各スリット８は一側が開放され、他側が逃がし孔９を介して形成した歪み取り用の可撓部（逃がし片）１０で閉鎖されている。この逃がし孔９の直径はスリット８の巾より十分大きく形成するのが好ましい。
図示の例では、基板部２の両端側の一つ孔付きのバスバー５′の部分を除き、２個の接続部３毎にピッチ調整手段７が設けてあり、計２か所である。
【００２８】
このように、バッテリ接続プレート１は２か所のピッチ調整手段７により三つの部分１Ａ，１Ｂおよび１Ｃに分画されている。従って、隣合う部分１Ａと１Ｂは、図２において矢線Ｒで示すように、可撓部１０を中心にたわみまたは開閉することにより、スリット８を中心として左右に移動させることができる。部分１Ｂと１Ｃも同様である。
【００２９】
また、各部分１Ａ，１Ｂおよび１Ｃの基板部２に対応してヒンジ１１により開閉自在のカバー１２が設けられており、各部分の基板部２とカバー１２にはロック手段を構成する係止突起１３と係止孔４ａを有する可撓性の係止片１４が設けられている。
【００３０】
なお、上記三つの部分１Ａ，１Ｂおよび１Ｃにおけるバスバー５，５′の孔６の中で、符号６ｓで示される端部の孔は基準孔として形成するのが好ましい。即ち、この基準孔６ｓは他の孔６と比べて角型バッテリ５１の電極５２または５３との隙間を小さくし、この基準孔６ｓを嵌合することにより、他の孔６はすべて隣接の電極５２または５３と自動的に合うようにして置く。
【００３１】
上記構成において、バッテリ接続プレート１を前記バッテリ集合体５０に組み付ける際には、まず各部分１Ａ，１Ｂおよび１Ｃの基準孔６ｓを対応する角型バッテリ５１の電極５２または５３に嵌め込んで行く。すると、各部分１Ａ，１Ｂおよび１Ｃの基準孔６ｓ以外の孔６は他の角型バッテリ５１の電極５２または５３に自動的に嵌合される。
そして、各基準孔６ｓ，６ｓ間にピッチのずれがあっても、このずれはピッチ調整手段７、即ちそのスリット８や可撓部１０によるたわみで吸収される。
【００３２】
バッテリ接続プレート１をバッテリ集合体５０に組付け、ねじ締め固定する際の、嵌合のための寸法公差は、従来は図１６に示すように『バッテリ巾Ａ×１３個分の最大寸法公差』＋『バッテリ接続プレート１の１３Ａ′の最大長さにおける公差』が関係していた。しかし、本発明を示す図１および図２の例では『バッテリ巾Ａ×４個分の最大寸法公差』＋『バッテリ接続プレート１の４Ａ′の最大長さにおける公差』となる。
【００３３】
即ち、バッテリ接続プレート１の基板部２に対して２個のピッチ調整手段７を設けたことにより、
▲１▼ 角型バッテリ５１の累積寸法が１／３以下、即ち、１３個⇒４個、
▲２▼ バッテリ接続プレート１の管理寸法の最大長さが１／３以下、
となった。
【００３４】
その結果、本発明によれば、角型バッテリの巾Ａの寸法公差の緩和およびバッテリ接続プレート１の寸法公差の緩和と共に、バスバー５，５′の孔径を小さくすることが可能となった。
【００３５】
図３は本発明に係るバッテリ接続プレートの第二の実施形態を示すものである。即ち、バッテリ接続プレート１のピッチ調整手段７′を、基板部２の各部分１Ａ，１Ｂおよび１Ｃを完全に分割するスリット８′と、分割面の両端側を互いに連結する略Ｕ字状ないし円弧状の薄肉のヒンジ状の可撓部１０′，１０′で構成したものである。
【００３６】
この場合には、各部分１Ａ，１Ｂおよび１Ｃの両側が可撓部１０′，１０′で連結されているので、図１の場合とは異なり、スリット８′を中心に一方（１Ａ）が他方（１Ｂ）に対して開き過ぎたり、垂れ下がるようなことがなく、取扱が容易である。
【００３７】
図４は本発明の第三の実施形態における後部のバッテリ接続プレート１５の平面図、図５は対応する前部のバッテリ接続プレート１６の平面図、図６は該プレート１６の斜視図である。
一対のバッテリ接続プレート１５，１６は２０槽の角型バッテリ５１よりなるバッテリ集合体５０（図１５参照）に組付けるように構成されている。
【００３８】
後部のバッテリ接続プレート１５は、合成樹脂製の基板部１７の長手方向の一側に沿って接続部３1 が横１列に形成されている。この基板部１７の左右両端側から接続部３1 の３番目と４番目の間にそれぞれピッチ調整手段７が設けられており、電極接続用の孔６が６個、８個、６個の三つの部分１５Ａ，１５Ｂおよび１５Ｃが区画形成され、各部分１５Ａ〜１５Ｃに対応してそれぞれヒンジ１８を介して開閉自在のカバー１９が設けられている。各接続部３1 は長窓４1 と二つ孔のバスバー５とから成る。ピッチ調整手段７は、一方を開放したスリット８と、スリットの他方に形成された略円形の逃がし孔９と、逃がし孔９に続く可撓部１０とで構成される。
【００３９】
以上は図１の前部のバッテリ接続プレート１と同様の構成であるが、上記バッテリ接続プレート１５は、全体の重量を減らしかつ必要な強度を確保するため、基板部１７をできるだけ薄く形成すると共に、開口部分である長窓４1 とピッチ調整手段７のスリット８の縁部にはそれぞれ補強リブとしての窓枠４ａと保護縁８ａを設け、長窓４1 内には二つ孔付きのバスバー５を嵌着して構成されている。
【００４０】
また、各カバー１９には、ヒンジ１８と反対側の側縁中央部に切欠２０を設けると共に、該切欠２０内に基板部１７側に突出する可撓ロックアーム２１を設け、対向する基板部１７には該アーム２１と係合するロック孔２２が設けられている。切欠２０の両側には可撓ロックアーム２１に対する保護壁２０ａが突設されている。可撓ロックアーム２１は、図７に示すように、基板部１７から立ち上がる支持片部２１ａと、これから湾曲部２１ｂを介して基板部１７側に戻る可撓片部２１ｃとから全体が断面Ｕ字状ないしＶ字状に形成され、可撓片部２１ｃの前面には係止突起２１ｄが形成されている。そして、可撓ロックアーム２１を受け入れるロック孔２２のリブ状の補強壁２２ａには上記係止突起２１ｄと係合する戻り止め２２ｂが設けられている。
【００４１】
さらに、接続部３1 を構成する長窓４1 は、図８にも示すように、長手方向の相対向する窓枠４ａ（図４）と共に底部４ｂを有し、底部４ｂの両側には二つ孔付きのバスバー５の孔６よりも一回り大きな孔４ｃ（図４）が設けられている。そして、対向する窓枠４ａの内面中央部にはそれぞれバスバー５に対する係止爪４ｄが突設されている。この一対の係止爪４ｄ，４ｄの対向面は入口側が広く内部に向けて狭くなる挿入案内斜面４ｅとして形成され、係止爪４ｄと底部４ｂとの間にはバスバー嵌着溝４ｆが形成された構造となる。
【００４２】
上記構造により、二つ孔付きのバスバー５は長窓４1 に対して簡単に固定することができる。即ち、図８において二点鎖線で示すように、バスバー５の一側を一方のバスバー嵌着溝４ｆに差し込んで、他側を矢線Ｆの如くに下向きに押圧すると、他方の挿入案内斜面４ｅに摺接しつつ係止爪４ｄの部分を弾性的に押し拡げ、これを乗り越えて下部のバスバー嵌着溝４ｆに嵌着される。
【００４３】
一方、前部のバッテリ接続プレート１６は、図５および図６に示すように、基板部２５の長手方向の一側に長窓４2 を備えた一連の接続部３2 を設けると共に、その左右両端に短窓４2 ′を備えた接続部３2 ′を設けてある。そして、基板部２５の左右両端側から接続部３2 の３番目と４番目の間にそれぞれピッチ調整手段７を設けて、電極接続用の孔６が７個、６個、７個の三つの部分１６Ａ，１６Ｂおよび１６Ｃを区画形成し、各部分１６Ａ〜１６Ｃの基板部２５にはそれぞれヒンジ２６を介して開閉自在のカバー２７を設けてある。
また、各カバー２７の中央部にはコ字状のスリット２０′を介して可撓ロックアーム２１を設け、各部分１６Ａ〜１６Ｃの基板部２５にはロック孔２２が設けられている。
【００４４】
以上は前述した後部のバッテリ接続プレート１５と同様であるが、本実施例に示す前部のバッテリ接続プレート１６は、接続部３2 や３2 ′に対して電圧検出用の端子２８やパワー線取付け用の丸型端子３４が簡単かつ安全に接続できる構造となっている。
【００４５】
電圧検出用の端子２８は、図１２と図１３に示すように、電線接続部２９に対して回路保護素子接続部３０，電気接触部３１の順で連成されており、導電性金属板のプレス、折曲加工により形成される。
【００４６】
電線接続部２９は基板部２８ａから起立連成した一対の絶縁体挟持片２９ａと導体挟持片２９ｂとを有し、信号線３２が圧着などにより接続されている。回路保護素子接続部３０は端子基板部２８ａからクランク曲げにより形成され、後で切断分離される細巾の連結片３０ａとその両端の巾広基端部分に設けた一対のリード線挿通孔３０ｂ，３０ｂを備える。電気接触部３１は前記バスバー５または５′に重畳して接続される板体であり、その中央に孔６と同径の孔３１ａを設け、該孔３１ａの周縁にさらに複数の樹脂漏れ点検孔３１ｂが円陣状に設けてある。
なお、丸型端子３４は市販品でよく、これに接続されるパワー線３５としては例えば公称断面積１２ｍｍ2 の絶縁被覆電線が使用される。
【００４７】
基板部２５の一側に整列した接続部３2 において、その長窓４2 の開口前面側即ちカバー２７との対向面側には二つ孔付きのバスバー５の孔６よりも十分大きな一対の円形窓枠３６ａ，３６ｂが設けられている。そして、一方の円形窓枠３６ｂと隣接して基板部２５の上下に貫通する回路保護素子取付枠３７が形成され、該取付枠３７の円形窓枠３６ｂとは反対側には基板部２５の他側に開口する信号線取出用の切欠部３７ａが形成されている。
【００４８】
同様に、基板部２５の左右両端側の接続部３2 ′において、その短窓４2 ′の開口前面側には一つ孔付きのバスバー５′（図１）の孔６よりも十分大きな半円またはＵ字形の窓枠３６ｃが設けられると共に、該窓枠３６ｃの両側の裾部から基板部２５（図６）の他側に向けて一段高くかつ平行にのびる一対の溝壁３８ａ，３８ａによりパワー線配設溝３８（図５）が形成されている。そして、このパワー線配設溝３８内、即ち一対の溝壁３８ａ，３８ａ間に上記接続部３2 と同じく回路保護素子取付枠３７が形成されている。
【００４９】
また、基板部２５の他側にはパワー線３５に対する複数の配設案内溝４０が一体に形成されている（図１１参照）。即ち、各部分１６Ａ〜１６Ｃの基板部２５には、その他側縁から長手方向と直交してのびかつ板面よりも一段高く設けられた一対のブラケット３９，３９を介して複数の（図示の例では３個）配設案内溝４０が並設されている。
【００５０】
さらに、基板部２５の他側には上記信号線３２に対応する保護樋４１が設けられている（図１０参照）。保護樋４１は各部分１６Ａ〜１６Ｃにおいて、上記切欠部３７ａと隣接して基板部２５の側縁に沿って板面よりも一段低く形成され、該保護樋４１にはヒンジ４２を介して開閉自在のカバー４３が一体に設けられている。そして、カバー４３の自由端部と基板部２５にはそれぞれ係止突起４４ａ（図１０）を有する係止片４４と係止溝４５ａを有する係止孔４５が設けられている。
【００５１】
なお、バッテリ接続プレート１６のなかで、左右の部分１６Ａと１６Ｃの基板部２５に対するカバー２７には、パワー線配設溝３８に対するキャップ部４６が隆起して形成され、また、各部分１６Ａ〜１６Ｃのカバー２７の自由縁部の中央には指かけ用の切欠部４７が形成され、この切欠部４７を挟むようにその自由縁部および左右の側縁には補強用のリブ２７ａが設けられている。さらに、三つの部分１６Ａ〜１６Ｃのうち、端部のバスバー５′，５の孔は図１の場合と同様に基準孔６ｓとして形成されている。
【００５２】
次に、前部のバッテリ接続プレート１６の製作について説明する。
バッテリ接続プレート１６は、各部分１６Ａ〜１６Ｃの基板部２５と対応するカバー２７を、それぞれ二つ孔付きのバスバー５および必要な一つ孔付きのバスバー５′と共にインサート成形により一体に形成する。
【００５３】
先ず、電圧検出用の端子２８（図１２）の電線接続部２９に対して信号線３２を圧着などにより接続したものを準備する。この電線付き端子２８を図示しない上下金型の一方にセットして、その電気接触部３１の上にバスバー５または５′を重ね合わせ、孔３１ａと孔６を一致させ、上下金型を閉じる。
【００５４】
次いで、金型内に樹脂を注入、硬化してプラスチック成形を行い、図９に示すように、端子２８の電気接触部３１が短窓４2 ′のＵ字形の窓枠３６ｃ（または長窓４2 における円形窓枠３６ｂ）の底部側に位置し、また、クランク曲げした回路保護素子接続部３０が回路保護素子取付枠３７の下端部に嵌着され、電線接続部２９に接続された信号線３２が信号線取出用の切欠部３７ａに位置する状態となるようにする。
【００５５】
インサート成形に際して、バスバー５または５′と端子２８の電気接触部３１の重ね合わせ部分に樹脂が入り込むと、樹脂漏れ点検孔３１ｂから樹脂がはみ出るから、接触不良の有無を外部から簡単にチェックすることができる。
【００５６】
プラスチック成形後、各端子２８に接続された信号線３２は切欠部３７ａから引出し、基板部２５の側縁に沿って折り曲げて保護樋４１に収納し、カバー４３を閉じて、その係止片４４を係止孔４５に差込み、係止突起４４ａを係止溝４５ａと係合させてロックする（図１０参照）。
【００５７】
また、各回路保護素子取付枠３７の上方から例えばヒューズ４８（図１４参照）を挿入し、その図示しないリード線を回路保護素子接続部３０のリード線挿通孔３０ｂ，３０ｂに差し込んでオートソルダー法などによりハンダ付けした後、連結片３０ａを切断分離する。これにより、端子２８には回路保護素子が接続される。
【００５８】
上記構成において、一対のバッテリ接続プレート１５，１６を図１５の場合と同様にしてバッテリ集合体５０の前後にねじ締めにより接続固定する。
前部のバッテリ接続プレート１６の組付に際し、図１の場合と同様に、まず各部分１６Ａ〜１６Ｃの基準孔６ｓを対応する角型バッテリ５１の電極５２または５３に嵌め込む。これにより基準孔６ｓ以外の孔６も他の角型バッテリ５１の電極５２または５３に自動的に嵌合されるから、それぞれボルトによりねじ締め固定する。同様にして後部のバッテリ接続プレート１５もねじ締め固定する。各基準孔６ｓ，６ｓ間にピッチのずれがあっても、ピッチ調整手段７によるたわみで吸収されるのは、前述と同様である。
【００５９】
以上により、バッテリ集合体５０の角型バッテリ５１1 ，５１2 ，…５１n 群は、図１４に示すように、バッテリ接続プレート１５，１６により直列に接続される。
前部のバッテリ接続プレート１６において、左右両端の接続部３2 ′を介してバッテリ５１に接続される丸型端子３４のパワー線３５は、基板部２５の配設案内溝４０に嵌着して保持させる。配設案内溝４０は図示のように３個設けてあるから、バッテリ集合体５０に接続される電源線，アース線の他ディストリビュータなどの充電器からの充電線といったパワー線を整然と配線、固定することができる。
【００６０】
一方、前記保護樋４１に収納された信号線３２群は図示しないＥＣＵに接続する。バッテリ接続プレート１６の両端と中間部の接続部３2 ′，３2 には、それぞれヒューズ４８を介装した電圧検出用の端子２８がバスバー５′，５と共に接続されているから、すべての角型バッテリ５１について２本一組で電圧をモニターすることができる。したがって、異常電圧を示す角型バッテリは二本を１ユニットとして簡単に交換することができる。
なお、パワー線３５と信号線３２群は基板部２５の他側縁に設けた配設案内溝４０と保護樋４１により上下に隔離して配設することができる。
【００６１】
また、バッテリ接続プレート１６のすべての接続部３2 または３2 ′でバスバー５，５′を締め付け固定したナットまたはボルトの頭部（いずれも図示せず）は、プレート板面から突出する円形窓枠３６ａ，３６ｂまたは３６ｃ内に収容された状態となるから、他の機器と短絡する危険は少ない。そして、基板部２５の各部分１６Ａ〜１６Ｃに設けたカバー２７を閉じることにより、可撓ロックアーム２１がロック孔２２に入り、係止突起２１ｄが戻り止め２２ｄと係合してロックされ（図７参照）、完全に外部と遮蔽、絶縁され、安全である。
【００６２】
カバー２７を開けるには、可撓ロックアーム２１の可撓片部２１ｃを例えばドライバの先端で支持片部２１ａ側に撓ませ、上記係合を解除する必要がある。従って、自動車の走行時の振動などで簡単に開くことはなく安全である。なお、上記解除状態では、カバー中央に指かけ用の切欠部４７を設けてあるから、簡単にあけることができ、便利である。
【００６３】
図１５は本発明に係るバッテリ接続プレートの第四の実施形態を示す全体斜視図、図１６は第四の実施形態の要部を示す側面図、図１７は同じく平面図、図１８は図１７のＤ−Ｄ線に沿う断面図である。
【００６４】
このバッテリ接続プレート７０は、合成樹脂製の基板部７１を各バスバー７２毎に分割し、基板部７１毎に、バッテリ集合体（図示せず）に対する複数の接続部７３をそれぞれ独立して形成し、隣接する各接続部７３を薄肉のヒンジ状の可撓部７４で連結したことを特徴とするものである。
【００６５】
各基板部７１の四方（前後左右）には壁部７５〜７８が立設されて、複数の箱状のバスバー収容部７９が構成されている。各バスバー収容部（各部分）７９は長手方向に配列されている。合成樹脂製の各バスバー収容部７９内に二つ孔の導電金属製の長方形のバスバー７２が装着されて前記接続部７３が構成されている。各基板部７１はバスバー７２の孔８０に対応する開孔８１（図１７）を有している。
【００６６】
各バスバー収容部７９の隣接する短辺側の壁部７７，７８はバッテリ接続プレート７０の長手直交方向に位置して、長辺側の壁部７５，７６よりも低く形成され、この短辺側の壁部７７，７８の先端側に前記ヒンジ状の可撓部７４が一体に形成されて、可撓部７４で各バスバー収容部７９が連結されている。分割された接続部７３における隣接する短辺側の壁部７７，７８と可撓部７４とでピッチ調整手段９８が構成されている。
【００６７】
可撓部７４は図１８の如く円弧状に湾曲して形成され、可撓部７４の先端７４ａは他の壁部７５，７６と同じ高さに位置している。可撓部７４の裾部７４ｂは、隣接する短辺側の壁部７７，７８と同一の厚みで短辺側の壁部７７，７８に一体に続いている。図１７の如く可撓部７４の長さは短辺側の壁部７７，７８の長さよりも短く、可撓部７４の長さ方向の両端側に矩形状の切欠部８２（図１５）が構成されている。
【００６８】
バッテリ集合体（図示せず）の各バッテリは各基板部７１（図１８）の裏面７１ａ（バスバー装着面７１ｂとは反対側の面）に接合され、各バッテリ（図示せず）の雄ねじ型の電極が基板部７１の開孔８１を経てバスバー収容部７９内のバスバー７２の孔８０を挿通し、バスバー収容部７９の空間内でナット（図示せず）で締付接続される。各バッテリ毎に可撓部７４で電極とバスバー７２の孔８０との位置ずれが吸収される。
【００６９】
ヒンジ状の可撓部７４はバッテリ集合体の取付面すなわち基板部７１の裏面７１ａとは反対側に離間してバスバー収容部７９の開口８３側に配設されている。バッテリ集合体と可撓部７４とはほぼバスバー収容部７９の高さ寸法分だけ遠く離れ、且つ可撓部７４はバッテリ集合体とは反対側に円弧状に湾曲して突出している。このため、可撓部７４の撓みの方向の自由度が高まり、少なくとも二軸方向の位置ずれ吸収が効率良く行われる。
【００７０】
位置ずれ吸収方向としては例えば図１５の矢印イのような捩り方向や、図１６の矢印ロのような縦曲げ（回動）方向、図１７の矢印ハのような横曲げ（揺動）方向、同じく矢印ニのような伸縮方向、同じく矢印ホのような剪断方向が挙げられ、各方向の位置ずれが可撓部７４によって確実に吸収される。
【００７１】
図１９に比較例を示す如く、バッテリ集合体８４の組付側において、略Ｖ字状に切欠された可撓部８５で各バスバー収容部８７の基板部８８側を連結した場合には、矢印ヘの如く曲げ方向すなわち一軸方向のみにしか位置ずれを吸収することができない。また、バスバー収容部８７の曲げ量は樹脂材の耐靱性を考慮してあまり大きくすることはできず、可撓部８５を形成する切欠部８６の大きさも小さく制限され、位置ずれ吸収量も小さくなる。また、切欠部８６をＶ字状に加工するために、樹脂成形金型（図示せず）に尖端を設ける必要があり、樹脂成形金型の加工性が悪くなり、しかもＶ字状の切欠部８６から可撓部８５に亀裂が入りやすいという懸念がある。
【００７２】
これに対し、本実施形態のバッテリ接続プレート７０は前述の如く基板部７１とは反対側に離間して可撓部７４を設けると共に、可撓部７４を円弧（湾曲）形状に形成したから、種々の方向に撓んで位置ずれを吸収可能である。また、可撓部７４を円弧形状に樹脂成形するための成形金型（図示せず）は、図１９のように可撓部８５をＶ字状に切欠するための成形金型（図示せず）よりも金型の加工性が良好であり、金型コストが低減される。さらに、湾曲状の可撓部７４は応力の分散性が良く、繰り返しの使用や長期の使用に対しても破損しにくい。
【００７３】
図１７に鎖線で示す如く、バスバーを支持する基板部は長円形の開孔（長窓）８１を有している。開孔８１の内側にバスバー７２の二つの孔８０が位置する。可撓部７４によって位置ずれが各接続部７３毎に吸収されるから、バスバー７２の孔８０の内径を雄ねじ型の電極（図示せず）の外径とほぼ同じに（厳密には若干大きく）設定することができ、小さな孔８０によって電極とバスバー７２との接触面積が増大し、電気的接続の信頼性が高まる。
【００７４】
バスバー７２はバスバー収容部７９内の係止爪８９（図１７）で固定されている。係止爪８９は図１５の如くバスバー収容部７９の前後の壁部７５，７６から内向きに突出形成されている。バスバー収容部７９の一方の壁部７６の外側にカバー９０がヒンジ９１を介して回動自在に設けられ、他方の壁部７５の外側には、バスバー収容部７９に対する位置決め用の枠部９２が設けられている。枠部９２については別の出願で提案している。カバーの先端側の垂壁９３に係止片（ロック手段）９４が設けられ、枠部９２に、係止片９４内に係合する係止突起（ロック手段）９５が設けられている。
【００７５】
カバー９０のヒンジ９１は各バスバー収容部７９すなわち接続部７３毎に設けられている。ヒンジ９１は薄肉に且つやや長めに形成され、接続部７３の位置ずれ吸収時の移動に合わせて撓み可能である。そのため、カバー９０が可撓部７４による位置ずれ吸収効果を阻害することがない。
【００７６】
枠部９２はバスバー収容部７９毎に設けられており、枠部９２によってバスバー収容部７９の位置ずれ吸収時の移動が阻害されることもない。カバー９０に対する係止突起９５をバスバー収容部７９ではなく外側の枠部９２に設けたから、カバー閉止時に可撓部７４の位置ずれ吸収効果が損なわれるという心配がない。
【００７７】
それらにより、バッテリ集合体の組付後において電極やバスバー７２に強い応力が加わることが防止されている。この応力は可撓部７４によっても当然に緩和されるものである。なお、枠部９２やカバー９０を有しないバッテリ接続プレート（例えば図１７に示す形態のもの等）においても、可撓部７４による位置ずれ吸収効果は顕著に発揮されることは言うまでもない。端部側のバスバー収容部７９の壁部７６の外面には、カバー９０の切欠部９６に進入する位置決め用の凸部９７が形成されており、カバー回動時の位置決めが確実に行われる。
【００７８】
【発明の効果】
以上説明したように、本発明によれば、バッテリ集合体の電極間のピッチの僅かな違いが、バッテリ接続プレートのピッチ調整手段により確実に吸収され、バッテリ集合体に対するバッテリ接続プレートの組付作業が容易化する。これにより、バッテリ集合体の両側程電極間のピッチの公差が大になるという問題や、バッテリの電極に無理な応力が作用するという問題が解消される。
【図面の簡単な説明】
【図１】本発明のバッテリ接続プレートの第一の実施形態を示す平面図である。
【図２】図１のスリット部分の拡大説明図である。
【図３】本発明のバッテリ接続プレートの第二の実施形態を示す平面図である。
【図４】本発明のバッテリ接続プレートの第三の実施形態の後部側を示す平面図である。
【図５】図４の後部側のバッテリ接続プレートと対をなす前部側のバッテリ接続プレートを示す平面図である。
【図６】図５のバッテリ接続プレートを示す斜視図である。
【図７】図４のＡ−Ａ線に沿う拡大断面図である。
【図８】図４のＢ−Ｂ線に沿う拡大断面図である。
【図９】図５のＡ−Ａ線に沿う拡大断面図である。
【図１０】図５のＢ−Ｂ線に沿う拡大断面図である。
【図１１】図５のＣ−Ｃ線に沿う拡大断面図である。
【図１２】図５の電圧検出用端子を示す拡大平面図である。
【図１３】図１２の電圧検出用端子を示す側面図である。
【図１４】図４および図５のバッテリ接続プレート１５，１６を使用したバッテリ接続状態の回路図である。
【図１５】本発明のバッテリ接続プレートの第四の実施形態を示す斜視図である。
【図１６】図１５のバッテリ接続プレートの要部を示す側面図である。
【図１７】同じくバッテリ接続プレートの要部を示す平面図である。
【図１８】図１７のＤ−Ｄ線に沿う拡大断面図である。
【図１９】図１５のバッテリ接続プレートとの対比例を示す要部断面図である。
【図２０】従来のバッテリ接続プレートとバッテリ集合体を示す分解斜視図である。
【図２１】図２０の一方のバッテリ接続プレート５４を示す平面図である。
【図２２】図２０の他方のバッテリ接続プレート５５を示す平面図である。
【図２３】（Ａ），（Ｂ）はそれぞれバッテリ接続プレート５４に用いられるバスバーの平面図であって、（Ａ）は二つ孔、（Ｂ）は一つ孔のものである。
【符号の説明】
１，１５，１６，７０ バッテリ接続プレート
２，１７，２５，７１ 基板部
３，３′，３1 ，３2 ，３2 ′，７３ 接続部
５，５′，７２ バスバー
７，７′，９８ ピッチ調整手段
８，８′ スリット
９ 逃がし孔
１０，１０′，７４ 可撓部
１１，１８，２６，９１ ヒンジ
１２，１９，２７，９０ カバー
１３，９５ 係止突起
１４，９４ 係止片
２８ 電圧検出用の端子
３２ 信号線
３５ パワー線
４０ 配設案内溝
４１ 保護樋
５０ バッテリ集合体
５１ 角型バッテリ
５２，５３ 電極[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a battery connection plate, and more specifically, in a battery polymer in which so-called square batteries each having positive and negative electrodes provided on opposite end faces are stacked in opposite directions, when connecting the batteries in series, Even if there is a slight difference in pitch, this is absorbed so that assembly and manufacturing can be facilitated.
[0002]
[Prior art]
In recent years, electric vehicles and hybrid vehicles that require high voltage and high output power sources are increasing as environmentally friendly vehicles. In order to reduce the size of the battery (battery), many small battery assembly techniques have become important.
[0003]
FIG. 20 shows a pair of front and rear battery connection plates 54 and 55 for connecting the positive and negative electrodes 52 and 53 of a conventional battery assembly 50 and a small prismatic battery 51 in series.
Bolts (or nuts) as the positive electrode 52 and the negative electrode 53 protrude from the front and rear end faces of the square battery 51. The plurality of prismatic batteries 51 are superposed with the positive and negative electrodes 52 and 53 alternately turned in opposite directions, and are fastened and fixed by rotating a belt 56.
[0004]
As shown in FIG. 21, the front battery connection plate 54 has a bus bar 58 with one hole on both the left and right sides of the board portion 57 made of synthetic resin, and a bus bar 59 with a plurality of two holes in the middle. It is constructed by inserting in a horizontal row by insert molding. Here, the bus bar 58 with one hole is a bus bar provided with one electrode connection hole 60 through which the electrode 52 or 53 is passed, as shown in FIGS. The bus bar 59 with two holes refers to a bus bar provided with two holes 60. Further, a cover 62 is attached to the upper edge of the substrate portion 57 by a plurality of hinges 61 so as to be opened and closed. After the battery connection plate 54 is fastened and fixed to the battery polymer 50 by the nut 63, a short circuit or the like is prevented. ing. 64 is a flexible locking piece having a locking hole 64a, and 65 is a locking projection.
[0005]
As shown in FIG. 22, the rear battery connection plate 55 is the same as the battery connection plate 54 except that the bus bar 58 with one hole is not provided. A bus bar 59 with a hole is assembled by insert molding in a horizontal row, and a cover 62 'that can be opened and closed by a plurality of hinges 61 is provided on the upper edge thereof.
[0006]
In the conventional battery assembly 50, the pitch A ′ between adjacent electrodes overlaps the width A of the square battery 51 itself with the misalignment between the positive and negative electrodes 52, 53 of the battery. The closer it is to the left and right ends, the greater the tolerance. Therefore, in the battery connection plates 54 and 55 having a single structure, the plurality of holes 60 of the bus bars 58 and 59 and the corresponding electrodes 52 and 53 are likely to be displaced, and smooth attachment work may be hindered.
[0007]
As a means for coping with such a situation, as shown in FIG. 21, for example, a hole 60 at one end of the front battery connection plate 54 is used as a reference hole, and from here to the holes 60 to the electrodes 53, 52, 53. There is a method in which the tolerance of the dimensions A ′, 2A ′, 3A ′... NA ′ (n = 13 in the illustrated example) is made as small as possible to increase the dimensional accuracy at the time of manufacture. However, this will increase the cost.
[0008]
As a second means, as shown in FIGS. 23A and 23B, the diameters of the holes 60 of the bus bar 59 with two holes and the bus bar 58 with one hole are sufficiently larger than the electrodes 52 and 53, respectively. There is a way to do it. However, since the contact area with the electrodes 52 and 53 is small, there is a risk of heat generation due to an increase in resistance, and the electrical connection becomes unstable.
[0009]
As a third means, the accuracy of the width dimension A of the square battery 51 itself and the positioning of the electrodes 52 and 53 is increased and the respective tolerances are reduced, but this also increases the cost.
[0010]
[Problems to be solved by the invention]
The present invention has been made paying attention to the above-mentioned problems of the prior art, and in addition to improving the accuracy of misalignment of the square battery itself and the positive and negative electrodes, the invention has been devised in the structure of the battery connection plate itself. Thus, an object of the present invention is to provide a battery connection plate having a structure in which even if there is a slight difference in the pitch between the electrodes of the battery assembly, this can be absorbed and assembled.
[0011]
[Means for Solving the Problems]
  In order to solve the above-mentioned problems, the invention according to claim 1 is a series of battery assemblies in which batteries each having a positive electrode at one end and a negative electrode at the other end are alternately stacked in opposite directions. To doA plurality of bus bar accommodating portions are provided in parallel on a synthetic resin substrate portion, and bus bars having two holes through which electrodes of adjacent batteries are inserted are provided in each bus bar accommodating portion. A connection to is configuredIn the battery connection plate, a pitch adjusting means for adjusting a positional deviation between the electrode and the hole of the bus bar is provided for each predetermined number of the connection portions.On the substrateIt is characterized by being provided.
[0012]
According to the first aspect of the present invention, for example, assuming that the predetermined number of connecting portions to be provided with pitch adjusting means is two, two bus bars with two holes for electrode connection, four holes and four holes, A square battery can be connected. Therefore, when the battery assembly 50 is composed of 14 square batteries 51 as shown in FIG. 20, the 14 electrodes are connected to each of the 4 poles by the pitch adjusting means.
Therefore, a slight difference in the pitch between the electrodes of the battery assembly is absorbed by the pitch adjusting means provided on the substrate portion of the battery connection plate, and the assembly becomes easy. Thereby, the problem that the tolerance of the pitch between the electrodes becomes larger toward both sides of the battery assembly can be easily solved.
Moreover, each part of the board | substrate part fractionated by the said pitch adjustment means should just raise only the precision of the pitch of four holes of two bus bars with two holes, for example, and the precision of the whole battery connection plate is Since it becomes fairly gradual, cost increases can be suppressed.
[0013]
According to a second aspect of the present invention, a slit is provided in the substrate part, one of the slits is opened, and a flexible part is formed on the other side of the slit through a relief hole, whereby the pitch adjusting means is configured. It is characterized by that.
According to the second aspect of the present invention, the substrate portion is displaced in the rotation direction on both sides of the slit with the escape hole as the center, and the positional deviation between the battery electrode and the bus bar hole is absorbed. When the flexible portion is thin, the flexible portion expands and contracts in the longitudinal direction of the substrate portion, and the substrate portion contacts and separates in the longitudinal direction without rotating on both sides of the slit, so that the positional deviation is absorbed. . The flexible portion is easily molded at low cost by the slit and the escape hole.
[0014]
The invention according to claim 3 is characterized in that the pitch adjusting means is configured by dividing the substrate portion by slits and connecting both sides of each substrate portion by a pair of hinge-like flexible portions. .
According to the invention of claim 3, since there are flexible portions on both sides of the substrate portion, the substrate portion can be rotated with any flexible portion as a fulcrum, and the rotation direction is not limited. It is possible to absorb not only the longitudinal direction of the part but also the misalignment in the direction perpendicular to the longitudinal direction, and the misalignment absorbability is enhanced. Further, the flexible portions on both sides can simultaneously expand and contract in the longitudinal direction of the substrate portion, and the substrate portion does not rotate on both sides of the slit, but can contact and separate in the longitudinal direction to absorb misalignment. The slit and the flexible portion are easily formed at low cost by an existing resin molding technique.
[0015]
  The invention according to claim 4In order to connect in series a battery assembly in which batteries with a positive electrode at one end and a negative electrode at the other end are alternately stacked in the opposite direction, a plurality of bus bar accommodating portions are arranged in parallel on the synthetic resin substrate portion. In the battery connection plate, a bus bar having two holes through which the electrodes of the adjacent battery are inserted is provided in each bus bar housing portion, and the bus bar and the bus bar housing portion constitute a connection portion for the battery. The board part is divided for each connection part, and each connection part is connected to each other by a hinge-like flexible part to constitute a pitch adjusting means for adjusting the positional deviation between the electrode and the hole of the bus bar. TheIt is characterized by that.
  According to the fourth aspect of the present invention, the positional deviation between the battery electrode and the bus bar hole is absorbed for each connecting portion, and the positional deviation absorption accuracy is increased. In addition, the hinge-like flexible portion absorbs misalignment in each of the front, rear, left, right, and up and down directions, which also increases the misalignment absorption accuracy. At the same time, stress during and after assembly to the battery electrode is relaxed, and damage to the battery is prevented.
[0016]
The invention according to claim 5 is characterized in that the flexible portion is provided on the opposite side of the battery assembly from the board portion.
According to the fifth aspect of the present invention, the span (distance) from the battery to the flexible portion is increased, and the bending operation of the flexible portion is smoothly and reliably performed by the action of the lever. Absorption efficiency is further increased.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
  Embodiments of the present invention will be described below with reference to the drawings. In addition, in order to avoid duplication of description about a battery assembly, a small square battery, etc., a diagram showing a conventional example20The description of is diverted.
  FIG. 1 shows a first embodiment of a battery connection plate according to the present invention.
[0024]
In FIG. 1, reference numeral 1 denotes a front battery connection plate corresponding to the battery assembly 50. The plate 1 is provided with a plurality of long windows (bus bar housing portions) 4 in a horizontal row on a substrate portion 2 made of synthetic resin. In addition, a bus bar 5 with two holes is embedded in each long window 4 to form a connection part 3 for screw fastening to the battery, and positive and negative electrodes between adjacent square batteries 51, 51 of the battery assembly 50 are formed. 52 and 53 can be connected. Further, a connecting portion 3 ′ composed of a short window 4 ′ and a bus bar 5 ′ with one hole is formed on the left and right ends of the group of connecting portions 3, and is external to the electrode 52 or 53 of the square battery 51. The power line to the can be connected.
[0025]
Here, the bus bar 5 with two holes refers to a long bus bar provided with two electrode connection holes 6 through which the electrode 52 or 53 passes, and a bus bar 5 'with one hole. Indicates a short bus bar provided with a single hole 6. These bus bars 5 and 5 ′ are integrally fixed to the substrate portion 2 by insert molding. The long window 4 of the connecting portion 3 may be provided separately into two short windows 4 '. In short, the portion of the hole 6 for electrode connection of the bus bars 5 and 5' is exposed to the outside and the bolt- It is only necessary to secure a space where the nut can be tightened.
[0026]
  The above is a figure20However, the present invention is different in that the pitch adjusting means 7 is provided for each predetermined number of connection portions 3 (or long windows 4).
[0027]
The pitch adjusting means 7 is for adjusting the shift of the pitch of the holes 6 of the bus bar 5 and has a plurality of slits 8 orthogonal to the longitudinal direction of the substrate portion 2, and one side of each slit 8 is opened. The other side is closed by a strain relief flexible portion (relief piece) 10 formed through a relief hole 9. The diameter of the escape hole 9 is preferably formed sufficiently larger than the width of the slit 8.
In the illustrated example, the pitch adjusting means 7 is provided for each of the two connecting portions 3 except for the portion of the bus bar 5 ′ having one hole on both ends of the substrate portion 2.
[0028]
Thus, the battery connection plate 1 is divided into three portions 1A, 1B, and 1C by the two pitch adjusting means 7. Therefore, the adjacent parts 1A and 1B can be moved left and right around the slit 8 by bending or opening and closing around the flexible part 10, as indicated by the arrow R in FIG. The same applies to the parts 1B and 1C.
[0029]
A cover 12 that can be opened and closed by a hinge 11 is provided corresponding to the substrate portion 2 of each of the portions 1A, 1B, and 1C, and the substrate portion 2 and the cover 12 of each portion are provided with locking protrusions that constitute locking means. 13 and a flexible locking piece 14 having a locking hole 4a.
[0030]
Of the holes 6 of the bus bars 5 and 5 'in the three portions 1A, 1B and 1C, the hole at the end indicated by reference numeral 6s is preferably formed as a reference hole. That is, the reference hole 6s has a smaller gap with the electrode 52 or 53 of the square battery 51 than the other holes 6, and all the other holes 6 are adjacent to each other by fitting the reference hole 6s. Place it automatically in line with 52 or 53.
[0031]
In the above configuration, when the battery connection plate 1 is assembled to the battery assembly 50, the reference holes 6s of the portions 1A, 1B and 1C are first fitted into the corresponding electrodes 52 or 53 of the square battery 51. Then, the holes 6 other than the reference hole 6 s of each portion 1 </ b> A, 1 </ b> B and 1 </ b> C are automatically fitted to the electrode 52 or 53 of the other square battery 51.
Even if there is a pitch shift between the reference holes 6s, 6s, the shift is absorbed by the deflection by the pitch adjusting means 7, that is, the slit 8 or the flexible portion 10.
[0032]
When the battery connection plate 1 is assembled to the battery assembly 50 and fixed with screws, the dimensional tolerance for fitting is conventionally “maximum dimensional tolerance for battery width A × 13” as shown in FIG. + “Tolerance in maximum length of 13A ′ of battery connection plate 1”. However, in the example of FIG. 1 and FIG. 2 showing the present invention, “battery width A × 4 maximum dimensional tolerance” + “tolerance in the maximum length of 4A ′ of battery connection plate 1”.
[0033]
That is, by providing two pitch adjusting means 7 for the substrate portion 2 of the battery connection plate 1,
(1) The cumulative size of the square battery 51 is 1/3 or less, that is, from 13 to 4
(2) The maximum length of the control dimensions of the battery connection plate 1 is 1/3 or less,
It became.
[0034]
As a result, according to the present invention, it is possible to reduce the hole diameter of the bus bars 5 and 5 ′ together with the reduction in the dimensional tolerance of the width A of the square battery and the reduction in the dimensional tolerance of the battery connection plate 1.
[0035]
FIG. 3 shows a second embodiment of the battery connection plate according to the present invention. That is, the pitch adjusting means 7 ′ of the battery connection plate 1 is made substantially U-shaped or circularly connecting the slits 8 ′ that completely divide the portions 1 A, 1 B, and 1 C of the board portion 2 and the both ends of the dividing surface. It is composed of arcuate thin-walled hinge-like flexible portions 10 'and 10'.
[0036]
In this case, since both sides of each portion 1A, 1B and 1C are connected by flexible portions 10 'and 10', unlike the case of FIG. 1, one (1A) is centered on the slit 8 '. It does not open too much or hangs down against (1B) and is easy to handle.
[0037]
4 is a plan view of the rear battery connection plate 15 according to the third embodiment of the present invention, FIG. 5 is a plan view of the corresponding front battery connection plate 16, and FIG. 6 is a perspective view of the plate 16.
The pair of battery connection plates 15 and 16 are configured to be assembled to a battery assembly 50 (see FIG. 15) composed of 20 tanks of a square battery 51.
[0038]
The rear battery connection plate 15 is connected to the connection portion 3 along one side in the longitudinal direction of the substrate portion 17 made of synthetic resin.1Are formed in one horizontal row. The connecting portion 3 from the left and right ends of the substrate portion 171Pitch adjusting means 7 is provided between the third and fourth portions, and six, eight, and six three portions 15A, 15B, and 15C are partitioned and formed, A cover 19 that can be opened and closed is provided via hinges 18 corresponding to the portions 15A to 15C. Each connection 31Is a long window 41And a two-hole bus bar 5. The pitch adjusting means 7 includes a slit 8 that is open on one side, a substantially circular escape hole 9 formed on the other side of the slit, and a flexible portion 10 that follows the escape hole 9.
[0039]
The above is the same configuration as the battery connection plate 1 in the front portion of FIG. 1, but the battery connection plate 15 is formed with the substrate portion 17 as thin as possible in order to reduce the overall weight and ensure the necessary strength. , Long window 4 which is an opening part1And a window frame 4a as a reinforcing rib and a protective edge 8a are provided at the edge of the slit 8 of the pitch adjusting means 7, respectively.1The bus bar 5 with two holes is fitted inside.
[0040]
Each cover 19 is provided with a notch 20 at the center of the side edge opposite to the hinge 18 and a flexible lock arm 21 projecting toward the substrate part 17 in the notch 20. Is provided with a lock hole 22 that engages with the arm 21. Protective walls 20a for the flexible lock arm 21 protrude from both sides of the notch 20. As shown in FIG. 7, the flexible lock arm 21 is generally U-shaped in cross section from a support piece portion 21a that rises from the substrate portion 17 and a flexible piece portion 21c that returns to the substrate portion 17 side through a curved portion 21b. A locking projection 21d is formed on the front surface of the flexible piece 21c. The rib-shaped reinforcing wall 22a of the lock hole 22 that receives the flexible lock arm 21 is provided with a detent 22b that engages with the locking protrusion 21d.
[0041]
Furthermore, the connection part 31Long window 418, as shown in FIG. 8, it has a bottom portion 4b together with a window frame 4a (FIG. 4) opposed to each other in the longitudinal direction, and is slightly rounder than the holes 6 of the bus bar 5 with two holes on both sides of the bottom portion 4b. A large hole 4c (FIG. 4) is provided. And the latching claw 4d with respect to the bus-bar 5 is each protrudingly provided by the center part of the inner surface of the window frame 4a which opposes. The opposing surfaces of the pair of locking claws 4d, 4d are formed as an insertion guide inclined surface 4e having a wide entrance side and narrowing toward the inside, and a bus bar fitting groove 4f is formed between the locking claw 4d and the bottom portion 4b. Structure.
[0042]
Due to the above structure, the bus bar 5 with two holes has a long window 4.1Can be easily fixed. That is, as shown by a two-dot chain line in FIG. 8, when one side of the bus bar 5 is inserted into one bus bar fitting groove 4f and the other side is pressed downward as indicated by the arrow F, the other insertion guide slope 4e The portion of the locking claw 4d is elastically pushed and expanded while being in sliding contact with it, and is fitted over the lower bus bar fitting groove 4f.
[0043]
On the other hand, as shown in FIGS. 5 and 6, the front battery connection plate 16 has a long window 4 on one side in the longitudinal direction of the board portion 25.2A series of connections 3 with2And short windows 4 on both the left and right sides.2Connection 3 with '2'Is provided. Then, the connection part 3 is formed from the left and right ends of the board part 252The pitch adjusting means 7 is provided between the third and fourth portions of the electrode, and the electrode connection holes 6 are divided into seven, six, and seven portions 16A, 16B, and 16C. A cover 27 that can be opened and closed via a hinge 26 is provided on each of the substrate portions 25 of ˜16C.
Further, a flexible lock arm 21 is provided at the center of each cover 27 via a U-shaped slit 20 ', and a lock hole 22 is provided in the substrate portion 25 of each of the portions 16A to 16C.
[0044]
The above is the same as the battery connection plate 15 in the rear part described above, but the battery connection plate 16 in the front part shown in this embodiment is connected to the connection part 3.2Or 32The terminal 28 for voltage detection and the round terminal 34 for attaching the power line can be easily and safely connected to '.
[0045]
As shown in FIGS. 12 and 13, the voltage detection terminal 28 is coupled to the wire connection portion 29 in the order of the circuit protection element connection portion 30 and the electrical contact portion 31. It is formed by pressing and bending.
[0046]
The electric wire connecting portion 29 has a pair of insulator holding pieces 29a and conductor holding pieces 29b that are erected from the substrate portion 28a, and the signal lines 32 are connected by crimping or the like. The circuit protection element connecting portion 30 is formed by crank bending from the terminal board portion 28a, and a narrow connecting piece 30a to be cut and separated later, and a pair of lead wire insertion holes 30b provided at the wide base end portions at both ends thereof. 30b. The electrical contact portion 31 is a plate connected to the bus bar 5 or 5 'so as to overlap therewith, and a hole 31a having the same diameter as the hole 6 is provided at the center thereof, and a plurality of resin leakage inspection holes are further provided at the periphery of the hole 31a. 31b is provided in a circle shape.
The round terminal 34 may be a commercially available product, and the power line 35 connected thereto may be, for example, a nominal cross-sectional area of 12 mm.2Insulated coated wires are used.
[0047]
Connection portion 3 aligned on one side of substrate portion 252In the long window 42A pair of circular window frames 36a and 36b that are sufficiently larger than the hole 6 of the bus bar 5 with two holes are provided on the front side of the opening, that is, on the side facing the cover 27. A circuit protection element mounting frame 37 is formed adjacent to one circular window frame 36b and penetrates the board portion 25 in the vertical direction, and the other side of the mounting frame 37 opposite the circular window frame 36b is the other portion of the board portion 25. A notch portion 37a for taking out a signal line that opens to the side is formed.
[0048]
Similarly, the connecting portions 3 on both the left and right sides of the substrate portion 25.2In ′, the short window 42A semicircular or U-shaped window frame 36c that is sufficiently larger than the hole 6 of the bus bar 5 '(FIG. 1) with a single hole is provided on the front side of the opening' and from the skirts on both sides of the window frame 36c. A power line disposition groove 38 (FIG. 5) is formed by a pair of groove walls 38a, 38a that are one step higher and parallel to the other side of the substrate portion 25 (FIG. 6). The connecting portion 3 is disposed in the power line groove 38, that is, between the pair of groove walls 38a and 38a.2Similarly, a circuit protection element mounting frame 37 is formed.
[0049]
A plurality of arrangement guide grooves 40 for the power line 35 are integrally formed on the other side of the substrate portion 25 (see FIG. 11). In other words, the substrate portion 25 of each of the portions 16A to 16C is provided with a plurality of (examples shown) via a pair of brackets 39, 39 provided perpendicular to the longitudinal direction from the other side edges and one step higher than the plate surface. The three arrangement guide grooves 40 are arranged side by side.
[0050]
Further, a protective rod 41 corresponding to the signal line 32 is provided on the other side of the substrate portion 25 (see FIG. 10). In each of the portions 16A to 16C, the protective rod 41 is formed one step lower than the plate surface along the side edge of the substrate portion 25 adjacent to the notch portion 37a. The protective rod 41 can be opened and closed via a hinge 42. The cover 43 is integrally provided. The free end portion of the cover 43 and the substrate portion 25 are provided with a locking piece 44 having a locking projection 44a (FIG. 10) and a locking hole 45 having a locking groove 45a.
[0051]
In the battery connection plate 16, the cover 27 for the left and right portions 16 </ b> A and 16 </ b> C with respect to the board portion 25 is formed with a raised cap portion 46 for the power line disposition groove 38, and each of the portions 16 </ b> A to 16 </ b> C. A notch 47 for hooking fingers is formed at the center of the free edge of the cover 27, and reinforcing ribs 27a are provided on the free edge and the left and right side edges so as to sandwich the notch 47. Yes. Further, among the three portions 16A to 16C, the holes of the bus bars 5 'and 5 at the end are formed as reference holes 6s as in the case of FIG.
[0052]
Next, the production of the battery connection plate 16 at the front part will be described.
The battery connection plate 16 integrally forms a cover 27 corresponding to the board portion 25 of each of the portions 16A to 16C together with the bus bar 5 with two holes and the bus bar 5 'with one hole required by insert molding.
[0053]
First, a signal line 32 connected to the electric wire connection portion 29 of the voltage detection terminal 28 (FIG. 12) by crimping or the like is prepared. The terminal 28 with electric wires is set on one of upper and lower molds (not shown), the bus bar 5 or 5 'is overlaid on the electrical contact portion 31, the holes 31a and the holes 6 are aligned, and the upper and lower molds are closed.
[0054]
Next, a resin is injected into the mold and cured to carry out plastic molding. As shown in FIG.2'U-shaped window frame 36c (or long window 4)2The circuit protection element connecting portion 30 which is located on the bottom side of the circular window frame 36 b) and is bent at the crank is fitted to the lower end portion of the circuit protection element mounting frame 37 and connected to the wire connecting portion 29. Is positioned in the notch 37a for taking out the signal line.
[0055]
During insert molding, if the resin enters the overlapped portion of the bus bar 5 or 5 'and the electrical contact portion 31 of the terminal 28, the resin protrudes from the resin leak inspection hole 31b. Can do.
[0056]
After plastic molding, the signal line 32 connected to each terminal 28 is drawn out from the notch portion 37a, bent along the side edge of the substrate portion 25 and stored in the protective rod 41, the cover 43 is closed, and the locking piece 44 Is inserted into the locking hole 45, and the locking projection 44a is engaged with the locking groove 45a to lock (see FIG. 10).
[0057]
Further, for example, a fuse 48 (see FIG. 14) is inserted from above each circuit protection element mounting frame 37, and a lead wire (not shown) is inserted into the lead wire insertion holes 30b and 30b of the circuit protection element connection portion 30 to perform the auto solder method. After soldering by, for example, the connecting piece 30a is cut and separated. As a result, a circuit protection element is connected to the terminal 28.
[0058]
In the above configuration, the pair of battery connection plates 15 and 16 are connected and fixed to the front and rear of the battery assembly 50 by screwing in the same manner as in FIG.
When the front battery connection plate 16 is assembled, as in the case of FIG. 1, first, the reference holes 6 s of the portions 16 </ b> A to 16 </ b> C are fitted into the corresponding electrodes 52 or 53 of the square battery 51. As a result, the holes 6 other than the reference hole 6s are automatically fitted to the electrodes 52 or 53 of the other square batteries 51, and are each screwed and fixed with bolts. Similarly, the rear battery connection plate 15 is also screwed and fixed. Even if there is a pitch shift between the reference holes 6s, 6s, it is absorbed by the deflection by the pitch adjusting means 7 as described above.
[0059]
Thus, the square battery 51 of the battery assembly 50 is obtained.1, 512, ... 51nThe groups are connected in series by battery connection plates 15 and 16 as shown in FIG.
In the battery connection plate 16 at the front part, the connection parts 3 at the left and right ends2The power line 35 of the round terminal 34 connected to the battery 51 via 'is fitted and held in the arrangement guide groove 40 of the substrate portion 25. Since the arrangement guide grooves 40 are provided as shown in the figure, power lines such as a power line connected to the battery assembly 50 and a charging line from a charger such as a distributor in addition to a ground line are arranged and fixed in an orderly manner. be able to.
[0060]
On the other hand, the group of signal lines 32 housed in the protective rod 41 is connected to an ECU (not shown). Connecting portion 3 at both ends and intermediate portion of battery connecting plate 162′, 32In addition, since the voltage detection terminals 28 with the fuses 48 interposed therebetween are connected together with the bus bars 5 ′ and 5, it is possible to monitor the voltage with a set of two for all the square batteries 51. Therefore, two square batteries exhibiting abnormal voltage can be easily replaced as a single unit.
Note that the power line 35 and the signal line 32 group can be arranged separately in the vertical direction by the arrangement guide groove 40 and the protective rod 41 provided on the other side edge of the substrate portion 25.
[0061]
In addition, all the connection parts 3 of the battery connection plate 162Or 32Since the nuts or bolt heads (both not shown) that fasten and fix the bus bars 5 and 5 'by' are in a state of being accommodated in the circular window frames 36a, 36b or 36c protruding from the plate plate surface, There is little risk of short circuiting with other devices. And by closing the cover 27 provided in each part 16A-16C of the board | substrate part 25, the flexible lock arm 21 enters into the lock hole 22, and the latching protrusion 21d engages with the detent 22d and is locked (FIG. 7), completely shielded from the outside, insulated and safe.
[0062]
In order to open the cover 27, it is necessary to bend the flexible piece portion 21c of the flexible lock arm 21 to the support piece portion 21a side with the tip of a driver, for example, and release the engagement. Therefore, it is safe because it does not open easily due to vibrations when the automobile is running. In the release state, the notch 47 for hooking the finger is provided in the center of the cover, which can be easily opened and is convenient.
[0063]
15 is an overall perspective view showing the fourth embodiment of the battery connection plate according to the present invention, FIG. 16 is a side view showing the main part of the fourth embodiment, FIG. 17 is a plan view, and FIG. It is sectional drawing which follows the DD line.
[0064]
The battery connection plate 70 divides a synthetic resin substrate portion 71 for each bus bar 72, and independently forms a plurality of connection portions 73 for battery assemblies (not shown) for each substrate portion 71. The adjacent connecting portions 73 are connected by a thin hinge-like flexible portion 74.
[0065]
Wall portions 75 to 78 are erected on four sides (front and rear, left and right) of each substrate portion 71 to form a plurality of box-shaped bus bar accommodating portions 79. Each bus bar accommodating portion (each portion) 79 is arranged in the longitudinal direction. A rectangular bus bar 72 made of conductive metal with two holes is mounted in each bus bar housing portion 79 made of synthetic resin, and the connection portion 73 is configured. Each substrate portion 71 has an opening 81 (FIG. 17) corresponding to the hole 80 of the bus bar 72.
[0066]
The adjacent short side walls 77 and 78 of each bus bar accommodating portion 79 are located in the longitudinal orthogonal direction of the battery connection plate 70 and are formed lower than the long side walls 75 and 76. The hinge-like flexible portion 74 is integrally formed on the distal end side of the wall portions 77, 78, and the bus bar accommodating portions 79 are connected by the flexible portion 74. Pitch adjusting means 98 is constituted by the adjacent short side wall portions 77 and 78 and the flexible portion 74 in the divided connection portion 73.
[0067]
As shown in FIG. 18, the flexible portion 74 is formed to be curved in an arc shape, and the distal end 74 a of the flexible portion 74 is located at the same height as the other wall portions 75 and 76. The skirt portion 74b of the flexible portion 74 has the same thickness as the adjacent short side wall portions 77 and 78, and continues to the short side wall portions 77 and 78 integrally. As shown in FIG. 17, the length of the flexible portion 74 is shorter than the lengths of the short side walls 77 and 78, and rectangular cutout portions 82 (FIG. 15) are provided at both ends in the length direction of the flexible portion 74. It is configured.
[0068]
Each battery of the battery assembly (not shown) is joined to the back surface 71a (the surface opposite to the bus bar mounting surface 71b) of each board portion 71 (FIG. 18), and the external thread type of each battery (not shown). The electrode passes through the hole 81 of the board portion 71 and passes through the hole 80 of the bus bar 72 in the bus bar housing portion 79 and is tightened and connected with a nut (not shown) in the space of the bus bar housing portion 79. The positional deviation between the electrode and the hole 80 of the bus bar 72 is absorbed by the flexible portion 74 for each battery.
[0069]
The hinge-like flexible portion 74 is disposed on the opening 83 side of the bus bar housing portion 79 so as to be separated from the attachment surface of the battery assembly, that is, the side opposite to the back surface 71 a of the substrate portion 71. The battery assembly and the flexible portion 74 are separated by approximately the height dimension of the bus bar accommodating portion 79, and the flexible portion 74 is curved and protrudes in an arc shape on the side opposite to the battery assembly. For this reason, the freedom degree of the bending direction of the flexible part 74 increases, and at least biaxial misalignment absorption is performed efficiently.
[0070]
As the misalignment absorption direction, for example, a twisting direction as indicated by an arrow A in FIG. 15, a vertical bending (turning) direction as indicated by an arrow B in FIG. 16, and a lateral bending (swinging) direction as indicated by an arrow C in FIG. Similarly, the expansion and contraction direction as indicated by arrow D and the shearing direction as indicated by arrow H are cited, and the displacement in each direction is reliably absorbed by the flexible portion 74.
[0071]
As shown in a comparative example in FIG. 19, on the assembly side of the battery assembly 84, when the board portion 88 side of each bus bar housing portion 87 is connected by a flexible portion 85 cut out in a substantially V shape, The displacement can be absorbed only in the bending direction, that is, in the uniaxial direction. In addition, the bending amount of the bus bar accommodating portion 87 cannot be increased so much in consideration of the toughness of the resin material, the size of the notch portion 86 forming the flexible portion 85 is limited to be small, and the misalignment absorption amount is also small. Become. Further, in order to process the notch 86 into a V shape, it is necessary to provide a point on a resin molding die (not shown), and the workability of the resin molding die is deteriorated. There is a concern that the flexible part 85 tends to crack from 86.
[0072]
On the other hand, the battery connection plate 70 of the present embodiment is provided with the flexible portion 74 spaced apart from the substrate portion 71 as described above, and the flexible portion 74 is formed in an arc (curved) shape. The misalignment can be absorbed by bending in various directions. A molding die (not shown) for resin-molding the flexible portion 74 into an arc shape is a molding die (not shown) for cutting the flexible portion 85 into a V shape as shown in FIG. ) Has better workability of the mold, and the mold cost is reduced. Further, the curved flexible portion 74 has good stress dispersibility and is not easily damaged even after repeated use or long-term use.
[0073]
As shown by a chain line in FIG. 17, the substrate portion that supports the bus bar has an oval opening (long window) 81. Two holes 80 of the bus bar 72 are located inside the opening 81. Since the misalignment is absorbed by each connecting portion 73 by the flexible portion 74, the inner diameter of the hole 80 of the bus bar 72 is substantially the same as the outer diameter of the male screw type electrode (not shown) (strictly slightly larger). The contact area between the electrode and the bus bar 72 is increased by the small hole 80, and the reliability of the electrical connection is increased.
[0074]
The bus bar 72 is fixed by a locking claw 89 (FIG. 17) in the bus bar accommodating portion 79. As shown in FIG. 15, the locking claw 89 is formed to project inward from the front and rear wall portions 75 and 76 of the bus bar housing portion 79. A cover 90 is rotatably provided on the outside of one wall 76 of the bus bar housing 79 via a hinge 91, and a positioning frame 92 for the bus bar housing 79 is provided on the outside of the other wall 75. Is provided. The frame portion 92 is proposed in another application. A locking piece (locking means) 94 is provided on the vertical wall 93 on the front end side of the cover, and a locking projection (locking means) 95 that engages in the locking piece 94 is provided on the frame portion 92.
[0075]
A hinge 91 of the cover 90 is provided for each bus bar accommodating portion 79, that is, for each connecting portion 73. The hinge 91 is thin and slightly long, and can be bent in accordance with the movement of the connecting portion 73 when absorbing the displacement. Therefore, the cover 90 does not hinder the effect of absorbing misalignment by the flexible portion 74.
[0076]
The frame portion 92 is provided for each bus bar accommodating portion 79, and the frame portion 92 does not hinder the movement of the bus bar accommodating portion 79 when absorbing the displacement. Since the locking projections 95 for the cover 90 are provided not on the bus bar accommodating portion 79 but on the outer frame portion 92, there is no concern that the effect of absorbing the displacement of the flexible portion 74 is impaired when the cover is closed.
[0077]
Thus, it is possible to prevent a strong stress from being applied to the electrodes and the bus bar 72 after the battery assembly is assembled. This stress is naturally relieved by the flexible portion 74. Needless to say, even in a battery connection plate that does not have the frame portion 92 and the cover 90 (for example, the one shown in FIG. On the outer surface of the wall portion 76 of the bus bar accommodating portion 79 on the end side, a positioning convex portion 97 that enters the cutout portion 96 of the cover 90 is formed, so that positioning when the cover is rotated is reliably performed.
[0078]
【The invention's effect】
  As explained above, the present inventionAccording to the batterySlight difference in pitch between the electrodes of the assemblyButThe battery connection plate is reliably absorbed by the pitch adjusting means, and the assembly work of the battery connection plate to the battery assembly is facilitated. This eliminates the problem that the tolerance of the pitch between the electrodes increases on both sides of the battery assembly and the problem that excessive stress acts on the battery electrodes.Is done.
[Brief description of the drawings]
FIG. 1 is a plan view showing a first embodiment of a battery connection plate of the present invention.
FIG. 2 is an enlarged explanatory view of a slit portion in FIG.
FIG. 3 is a plan view showing a second embodiment of the battery connection plate of the present invention.
FIG. 4 is a plan view showing a rear side of a third embodiment of a battery connection plate of the present invention.
5 is a plan view showing a battery connection plate on the front side that forms a pair with the battery connection plate on the rear side in FIG. 4; FIG.
6 is a perspective view showing the battery connection plate of FIG. 5. FIG.
7 is an enlarged sectional view taken along line AA in FIG.
8 is an enlarged cross-sectional view taken along line BB in FIG.
9 is an enlarged cross-sectional view taken along line AA in FIG.
10 is an enlarged sectional view taken along line BB in FIG.
11 is an enlarged cross-sectional view taken along line CC in FIG.
12 is an enlarged plan view showing a voltage detection terminal of FIG. 5;
13 is a side view showing the voltage detection terminal of FIG. 12. FIG.
14 is a circuit diagram of a battery connection state using the battery connection plates 15 and 16 of FIGS. 4 and 5. FIG.
FIG. 15 is a perspective view showing a fourth embodiment of the battery connection plate of the present invention.
16 is a side view showing a main part of the battery connection plate of FIG. 15;
FIG. 17 is a plan view showing the main part of the battery connection plate.
18 is an enlarged cross-sectional view taken along the line DD of FIG.
19 is a cross-sectional view of a principal part showing a comparison with the battery connection plate of FIG. 15;
FIG. 20 is an exploded perspective view showing a conventional battery connection plate and a battery assembly.
21 is a plan view showing one battery connection plate 54 of FIG.
22 is a plan view showing the other battery connection plate 55 of FIG. 20. FIG.
FIGS. 23A and 23B are plan views of a bus bar used for the battery connection plate 54, respectively, FIG. 23A having two holes and FIG. 23B having one hole.
[Explanation of symbols]
1,15,16,70 Battery connection plate
2,17,25,71 Board part
3, 3 ', 31, 32, 32', 73 connection part
5,5 ', 72 Busbar
7, 7 ', 98 Pitch adjustment means
8,8 'slit
9 Relief hole
10, 10 ', 74 Flexible part
11, 18, 26, 91 Hinge
12, 19, 27, 90 cover
13,95 Locking projection
14,94 Locking piece
28 Voltage detection terminals
32 signal lines
35 power line
40 Disposition guide groove
41 Protective fence
50 battery assembly
51 square battery
52, 53 electrodes

Claims (5)

一端に正の電極、他端に負の電極を設けたバッテリを交互に逆向きに重ね合わせてなるバッテリ集合体を直列に接続するために、合成樹脂製の基板部にバスバー収容部が複数並列に設けられ、隣接するバッテリの電極を挿通する二つの孔を有するバスバーが各バスバー収容部内に設けられ、該バスバーと該バスバー収容部とでバッテリに対する接続部が構成されたバッテリ接続プレートにおいて、
所定の数の前記接続部毎に、前記電極と前記バスバーの孔との位置ずれを調整するためのピッチ調整手段が前記基板部に設けられたことを特徴とするバッテリ接続プレート。In order to connect in series a battery assembly in which batteries with a positive electrode at one end and a negative electrode at the other end are alternately stacked in the opposite direction, a plurality of bus bar accommodating portions are arranged in parallel on the synthetic resin substrate portion. In the battery connection plate, a bus bar having two holes through which the electrodes of the adjacent battery are inserted is provided in each bus bar housing portion, and the bus bar and the bus bar housing portion constitute a connection portion for the battery.
A battery connection plate, wherein a pitch adjusting means for adjusting a positional deviation between the electrode and the hole of the bus bar is provided in the substrate portion for each predetermined number of the connection portions. 前記基板部にスリットが設けられ、該スリットの一方が開放され、該スリットの他方に逃がし孔を介して可撓部が形成されて、前記ピッチ調整手段が構成されたことを特徴とする請求項１記載のバッテリ接続プレート。  A slit is provided in the substrate part, one of the slits is opened, and a flexible part is formed on the other side of the slit through a relief hole, thereby configuring the pitch adjusting means. The battery connection plate according to 1. 前記基板部がスリットで分割され、各基板部の両側が一対のヒンジ状の可撓部で連結されて、前記ピッチ調整手段が構成されたことを特徴とする請求項１記載のバッテリ接続プレート。  2. The battery connection plate according to claim 1, wherein the substrate portion is divided by a slit, and both sides of each substrate portion are connected by a pair of hinge-like flexible portions to constitute the pitch adjusting means. 一端に正の電極、他端に負の電極を設けたバッテリを交互に逆向きに重ね合わせてなるバッテリ集合体を直列に接続するために、合成樹脂製の基板部にバスバー収容部が複数並列に設けられ、隣接するバッテリの電極を挿通する二つの孔を有するバスバーが各バスバー収容部内に設けられ、該バスバーと該バスバー収容部とでバッテリに対する接続部が構成されたバッテリ接続プレートにおいて、
前記基板部が前記接続部毎に分割され、各接続部がヒンジ状の可撓部で相互に連結されて、前記電極と前記バスバーの孔との位置ずれを調整するためのピッチ調整手段が構成されたことを特徴とするバッテリ接続プレート。 In order to connect in series a battery assembly in which batteries with a positive electrode at one end and a negative electrode at the other end are alternately stacked in the opposite direction, a plurality of bus bar accommodating portions are arranged in parallel on the synthetic resin substrate portion. In the battery connection plate, a bus bar having two holes through which the electrodes of the adjacent battery are inserted is provided in each bus bar housing portion, and the bus bar and the bus bar housing portion constitute a connection portion for the battery.
The substrate portion is divided for each connection portion, and each connection portion is connected to each other by a hinge-like flexible portion to constitute a pitch adjustment means for adjusting the positional deviation between the electrode and the hole of the bus bar. A battery connection plate characterized by the above . 前記可撓部が前記基板部よりも前記バッテリ集合体の取付反対側に離間して設けられたことを特徴とする請求項４記載のバッテリ接続プレート。  5. The battery connection plate according to claim 4, wherein the flexible portion is provided on a side opposite to the attachment side of the battery assembly from the substrate portion.
JP24839899A 1998-09-09 1999-09-02 Battery connection plate Expired - Lifetime JP3707595B2 (en)

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